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Note 3 - Revenue Recognition - Schedule of Contract Liabilities from Contracts with Customers from Acquisition (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Contract acquisition costs, current	$ 81	$ 113
Contract acquisition costs, long-term	0	9
Total	$ 81	$ 122

X

- Definition

Represents Contract Acquisition Costs, Current

+ References

No definition available.

+ Details

Name:	dmrc_ContractAcquisitionCostsCurrent
Namespace Prefix:	dmrc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Represents Contract Acquisition Costs, Noncurrent

+ References

No definition available.

+ Details

Name:	dmrc_ContractAcquisitionCostsNoncurrent
Namespace Prefix:	dmrc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Represents Contract Acquisition Costs, total

+ References

No definition available.

+ Details

Name:	dmrc_ContractAcquisitionCostsTotal
Namespace Prefix:	dmrc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant